NSX Data Center Enterprise+ is also referred as Enterprise+ edition of NSX for vSphere (NSX-V) which is a new product edition that is available through the Flex Pricing Model. This product edition is charged based on 4.5 Points per 1 GB Reserved Ram (based on average monthly usage)
Usage Meter does not currently meter the NSX-V Enterprise+ and you will need to report the version and usage manually. Please review metering steps outlined in the VCPP Product Usage Guide.